aboutsummaryrefslogtreecommitdiff
path: root/arch/x86
diff options
context:
space:
mode:
authorAndreas Herrmann <andreas.herrmann3@amd.com>2008-12-16 19:07:47 +0100
committerIngo Molnar <mingo@elte.hu>2008-12-16 19:58:00 +0100
commit3c763fd77e66e55d029052da31df0abd9920cb1e (patch)
tree9c490ea8fc965f4bce2dd62708fcccbcad430bc9 /arch/x86
parent5279585ff2bedc8180da5bdf8aa3ff1736466de2 (diff)
x86: microcode_amd: fix wrong handling of equivalent CPU id
Impact: fix bug resulting in non-loaded AMD microcode mc_header->processor_rev_id is a 2 byte value. Similar is true for equiv_cpu in an equiv_cpu_entry -- only 2 bytes are of interest. Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/microcode_amd.c23
1 files changed, 6 insertions, 17 deletions
diff --git a/arch/x86/kernel/microcode_amd.c b/arch/x86/kernel/microcode_amd.c
index 5f8e5d75a25..b5bc81470bc 100644
--- a/arch/x86/kernel/microcode_amd.c
+++ b/arch/x86/kernel/microcode_amd.c
@@ -62,7 +62,7 @@ struct microcode_header_amd {
unsigned int mc_patch_data_checksum;
unsigned int nb_dev_id;
unsigned int sb_dev_id;
- unsigned char processor_rev_id[2];
+ u16 processor_rev_id;
unsigned char nb_rev_id;
unsigned char sb_rev_id;
unsigned char bios_api_rev;
@@ -125,7 +125,7 @@ static int get_matching_microcode(int cpu, void *mc, int rev)
while (equiv_cpu_table[i].installed_cpu != 0) {
if (current_cpu_id == equiv_cpu_table[i].installed_cpu) {
- equiv_cpu_id = equiv_cpu_table[i].equiv_cpu;
+ equiv_cpu_id = equiv_cpu_table[i].equiv_cpu & 0xffff;
break;
}
i++;
@@ -137,21 +137,10 @@ static int get_matching_microcode(int cpu, void *mc, int rev)
return 0;
}
- if ((mc_header->processor_rev_id[0]) != (equiv_cpu_id & 0xff)) {
- printk(KERN_ERR
- "microcode: CPU%d patch does not match "
- "(patch is %x, cpu extended is %x) \n",
- cpu, mc_header->processor_rev_id[0],
- (equiv_cpu_id & 0xff));
- return 0;
- }
-
- if ((mc_header->processor_rev_id[1]) != ((equiv_cpu_id >> 16) & 0xff)) {
- printk(KERN_ERR "microcode: CPU%d patch does not match "
- "(patch is %x, cpu base id is %x) \n",
- cpu, mc_header->processor_rev_id[1],
- ((equiv_cpu_id >> 16) & 0xff));
-
+ if (mc_header->processor_rev_id != equiv_cpu_id) {
+ printk(KERN_ERR "microcode: CPU%d patch does not match "
+ "(processor_rev_id: %x, eqiv_cpu_id: %x)\n",
+ cpu, mc_header->processor_rev_id, equiv_cpu_id);
return 0;
}